AprilAire #1413 Upgrade Kit and # 413 Filter Replacement Media W0631F Available in standard and custom

Available in standard and custom size in 1" depth

Size: 7 1/2" x 8" x 1/2"

or if the furnace fan is running continuously

General Filters Media  Part # GFGA100A11

AprilAire #1413 Upgrade Kit and # 413 Filter Replacement Media W0631F Available in standard and customAprilaire 1413 Upgrade Kit and #413 Filter Replacement Media for Models 2400 2140 Air Cleaners These are the original, OEM expandable "accordion" style, factory recommended upgrade kit, and replacement filters for the Aprilaire Space Gard Model 2400 Air Cleaner. Assembly instructions are in the box. The air filter media can last from a few months up to 2 years. It may be necessary to change the media more frequently, in the presence of a high